A suspension device for a wheeled vehicle with a plurality of air springs is described. Two main air chambers of two air springs of a respective vehicle axle are connected together via a transverse air chamber which forms an intermediate volume. A compressor arranged between the two transverse air chambers is connected to the first transverse air chamber via a first connecting line in which a first switchable valve is arranged, and to the second transverse air chamber via a second connecting line in which a second switchable valve is arranged, so that direct filling/direct evacuation of the intermediate volumes of the two transverse air chambers is possible.

An air management system for a vehicle having a first pneumatic circuit and a second pneumatic circuit, in which the first and second pneumatic circuits are pneumatically connected in a neutral position via a cross-flow mechanism. The first pneumatic circuit includes a first leveling valve configured to adjust independently the height of a first side of the vehicle. The second pneumatic circuit includes a second leveling valve configured to adjust independently the height of a second side of the vehicle. The first and second leveling valves are configured to establish pneumatic communication between the first and second pneumatic circuits when the first leveling valve is not independently adjusting the height of the first side of the vehicle and the second leveling valve is not independently adjusting the height of the second side of the vehicle.

An air suspension control system (ECAS, electronic controlled air suspension) (10) for a utility vehicle, such as a truck or the like, or for a passenger car, includes a main control unit (12) for operating the air suspension control system (10)and at least two auxiliary control units (14) connected to the main control unit (12) via a data link (16). The auxiliary control units (14) each have at least one output (18) for actuating at least one actuator (20) which can be connected to the output (18), in particular an adjustment drive (28) for a valve (30). Furthermore, at least one function for generating control signals at the output (18) can be stored in the auxiliary control units (14), and the main control unit (12) is adapted to call up and/or to parameterize at least the stored functions by transmitting commands via the data link (16).

A vehicle height adjusting device includes a vehicle height adjusting unit, a prediction unit, and a vehicle height control unit. The vehicle height adjusting unit adjusts a vehicle height to one of a first state and a second state. In the first state, the vehicle height is set to a predetermined height, and in the second state, the vehicle height is set lower than the first state. The prediction unit predicts whether a drive battery (lower portion) of a vehicle interferes with a road surface in the second state. The vehicle height control unit controls the vehicle height adjusting unit to set the vehicle height to one of the first state and the second state. When the prediction unit predicts an interference between the drive battery of the vehicle and the road surface, the vehicle height adjusting unit restricts a transition from the first state to the second state.

A ramp-equipped vehicle includes: a vehicle-height adjusting mechanism configured to adjust a vehicle height of a vehicle; a ramp configured to be movable between a deployed state and a stored state, the deployed state being a state where the ramp protrudes outwardly from the vehicle, the stored state being a state where the ramp is stored inside the vehicle; and a camera configured to detect a person coming closer to the vehicle. When the camera detects a person coming closer to a doorway of the vehicle during vehicle height adjustment by the vehicle-height adjusting mechanism, the vehicle height adjustment by the vehicle-height adjusting mechanism is interrupted.

A shock assembly with automatically adjustable ride height. The shock assembly includes a main chamber with a working fluid therein. A damping piston coupled to a piston shaft, the damping piston disposed in the main chamber to divide the main chamber into a compression side fluid chamber and a rebound side fluid chamber. An automatic ride height adjustment assembly including an internal floating piston (IFP) pump assembly and a spring preload piston assembly.

A concurrent leveling system includes a pressurized air source. A manifold block, having a body defining an air feed inlet, is disposed between air springs and the pressurized air source. The body includes front and rear suspension valves. Each of the suspension valves defines a suspension valve orifice having a first predetermined diameter. The body includes at least one restrictor valve parallel to and in fluid communication with the front suspension valves. The at least one restrictor valve includes a first check valve and a first blocker valve orifice defining a first orifice diameter. The first check valve and the first blocker valve orifice are disposed parallel to one another and in series with the front suspension valves and in fluid communication with the air feed inlet and the front suspension valves for reducing fluid back flow to allow the vehicle to be lowered in nominal loading conditions.

An electric height control device may include: an oil storage part configured to store oil therein; a motor driving part inserted into the oil storage part and driven when power is applied thereto; a hydraulic block part coupled to the motor driving part, connected to the oil storage part, and configured to amplify oil; and a control part coupled to the hydraulic block part, and configured to control the motor driving part and the hydraulic block part.

A shock assembly with automatically adjustable ride height is disclosed herein. The shock assembly includes a main chamber with a working fluid therein. A damping piston coupled to a piston shaft, the damping piston disposed in the main chamber to divide the main chamber into a compression side fluid chamber and a rebound side fluid chamber. An automatic ride height adjustment assembly including an internal floating piston (IFP) pump assembly and a spring preload piston assembly.

A vehicle includes a chassis, a first tractive assembly coupled to the chassis, a second tractive assembly coupled to the chassis, and a controller. The first tractive assembly includes a first tractive element and a first actuator coupled to the first tractive element and configured to move the first tractive element relative to the chassis. The second tractive assembly includes a second tractive element and a second actuator coupled to the second tractive element and configured to move the second tractive element relative to the chassis. The controller is operatively coupled to the first actuator and the second actuator and configured to control at least one of the first actuator and the second actuator to raise the second tractive element with respect to the first tractive element in response to an indication that the second tractive element is disabled.